/*
 * Copyright 2010 - 2011, The PLDesktop Development Team
 *
 *  This library is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Lesser General Public
 *  License as published by the Free Software Foundation; either
 *  version 2.1 of the License, or (at your option) any later version.
 *
 *  This library is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 *  Lesser General Public License for more details.
 *
 *  You should have received a copy of the GNU Lesser General Public
 *  License along with this library; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 *
 */

#include "PLJavaAttributeCodeStack.h"

using namespace PLSDK;

PLJavaAttributeCodeStack::PLJavaAttributeCodeStack(u2 newMaxStackSize) : m_maxStackSize(newMaxStackSize), m_stackPos(0), m_empty(true) {
    m_stack = new PLJavaStackValue *[newMaxStackSize + 1];
}

PLJavaAttributeCodeStack::~PLJavaAttributeCodeStack() {
    delete m_stack;
}

void PLJavaAttributeCodeStack::push(PLJavaStackValue *data) {
    if(m_stackPos >= m_maxStackSize) {
        printf("Error Stack overflow, max size was %d.", m_maxStackSize);
        return;
    }
    m_stack[m_stackPos] = data;
    m_stackPos++;
    m_empty = false;
}

PLJavaStackValue *PLJavaAttributeCodeStack::pop() {
    if(m_empty) {
        printf("Error pop from empty stack.");
        return 0;
    }
    if(m_stackPos == 0) {
        m_empty = true;
    } else {
        m_stackPos--;
    }
    return m_stack[m_stackPos];
}
